The fixed series capacitor compensation device is usually used and operated in the complicatedelectromagnetic environments of UHV AC substation. Therefore

it’s necessary in the design stage toevaluate reasonably the operation electric field strength of the FSC. In this paper

the power frequencyelectrical filed simulation calculation is performed by the tree-dimensional finite element software Ansys.The simulation calculation data provides important reference for the power frequency electrical field of thescheme after optimization meet the design requirement of the electrical field strength.